Fix test that used an oversized int literal

Author: marijnh

src/test/run-pass/drop-parametric-closure-with-bound-box.rs

@@ -1,5 +1,5 @@
 
 
-fn f<T>(i: @int, t: T) { }
+fn f<T>(i: @uint, t: T) { }
 
-fn main() { let x = bind f::<char>(@0xdeafbeef, _); }
+fn main() { let x = bind f::<char>(@0xdeafbeefu, _); }